Keeping a cast of the original shape of tools
After owning a bowl gouge for a while which I thought was close to an Ellsworth grind I bought a new tool which is in fact the Ellsworth grind and saw how different my version had been. Being aware that the shape could drift considerably over time I'm looking to keep an "original" to refer to in the future, so tonight I used "Shape Lock" plastic to form a mold and once the plastic hardened I poured plaster of paris in my mold to try to create a copy of the original shape of the tool - now I'm waiting for it to harden and see if I can get it out.
Besides taking pictures, has anyone else tried to keep a copy of the reference shape of their tools? If so, how?